Gear cutting vise



Oct. 5, 1954 s. CENEROSKY 2,690,705

GEAR CUTTING VISE Filed July 17, 1953 2 Sheets-Sheet l INVENTOR. Szon/eyCener'os kg Oct. 5, 1954 s. CENEROSKY 2,690,705

GEAR CUTTING VISE Filed July 17, 1955 2 Sheets-Sheet 2 jig L 7 INVENTOR.

dzcm/eg C6/7/"O6 k 5/ HTTdK/YEYS Patented Oct. 5, 1954 3 Claims.

This invention relates to lathe attachments, and more particularly to agear cutting vise for use on a lathe.

The main object of the invention is to provide a novel and improvedlathe attachment for cutting gears, said attachment being simple inconstruction, being easy to mount on a lathe, and securely supporting agear blank in position for cutting the teeth thereof.

A further object of the invention is to provide an improved vise forsupporting a gear blank on the bed of a lathe for cutting gear teeth onthe blank, said vise involving inexpensive components, being durable inconstruction, and being easily adjustable in accordance with the size ofthe gear blank.

Further objects and advantages of the invention will become apparentfrom the following description and. claims, and from the accompanyingdrawings, wherein:

Figure 1 is a fragmentary side elevational View of a lathe on which ismounted a gear cutting vise constructed in accordance with the presentinvention, with a gear blank secured in the vise and with the cuttingtool mounted in the lathe for engagement with the periphery of theblank.

Figure 2 is an enlarged top plan view, partly in cross section, of thegear cutting vise shown in Figure 1.

Figure 3 is a front elevational view of the gear cutting viseillustrated in Figures 1 and 2.

Figure e is a rear elevational view of the gear cutting vise of Figures1 to 3.

Figure 5 is cross sectional view taken on the line 5-5 of Figure 2.

Referring to the drawings, H designates the bed of a conventional lathehaving the tail stock l2 and having a head stock not shown, to which isdrivingly coupled, in a conventional manner, a chuck 53. Designated atIt is the cutter spindle which is drivingly coupled to the chuck i3 andwhich is rotatably supported by the tail stock l2 in the mannerillustrated in Figure 1. The cutter shaft it is provided with the geartooth cutting elements I5 arranged in radial sets, spaced along theshaft i l, each set of cutters l5 corresponding to a different size orshape of gear tooth.

The gear blank vise is designated generally at [6 and comprises a basemember 1'! having the central rectangular aperture l8 and having thedepending longitudinal rib elements !9, l9 adapted to engage over thelongitudinal edges of the lathe bed H. The base I! is formed at itsopposite ends, midway between the depending ribs l9, l9, with thedepending rectangular 2 lugs 20 adapted to be received in the usuallongitudinal slot of the lathe bed I I.

Designated respectively at El, are bar members which are disposedtransversely on the 0pposite ends of the base H and which are formedwith the inwardly extending horizontal flanges 22. The bar members 21are secured on the base member I! by respective vertical bolts 23 whichextend through the bar members 2i and the end portions of the base I7and which are threadedly engaged with the respective rectangular lockingplates 24, 24, said plates being rotatable to the position thereof shownin Figure 5, whereby the plates engage beneath the respective lathe bedtracks adjacent the respective ends of the depending lugs to clamp thebase as well as the bar members 2 i, to the lathe bed. Therefore, itwill be understood, that the locking plates as are rotated to positionsextending parallel to the ribs it when vise is to be mounted on thelathe, and that after the vise has been mounted on the lathe bed, theplates 26 are rotated to the positions thereof illustrated in Figure 5,and are tightened in these positions by tightening the bolts 23, thusclamping the vise to the lathe bed.

Designated at 25 is a first jaw member which is slidably mounted on thebase I? and which is formed with ribs 26, 23 which are slidably receivedbeneath the respective flanges 22, 22 of the bar members 2!, 2i. Securedto one side margin of the base member l? is the vertical plate member27, the plate member 2? being formed at its intermediate portion with anupstanding element 28 rigidly secured thereto. Threadedly engagedthrough the element 28 is the transverse feed screw 29, said feed screw29 being formed with an enlarged cylindrical head 39 which is receivedin a recess 3| formed in the first jaw member 25. Designated at 32 is anapertured plate which is secured to the outer face of the jaw member 25and through which the screw member 29 rotatably extends, as shown inFigure 5. The plate member 32 thus rotatably secures the end of thescrew member it to the first jaw member 25, whereby rotation of thescrew member 29 moves the jaw member 2:2 herizontally, as viewed inFigure 5, namely, either to the right or left. The screw member 2% isprovided at its outer end with the transversely extending handle bar 33,for manually rotating said screw member,

Designated at 3% is a second jaw member which is formed at its sidemarginal portions with the respective ribs 35, 35 slidably receivedbeneath 3 the respective flanges 22, 22 of the bar members 2|, 2|, asshown in Figure 4. The second jaw member 34 is positioned on the basemember I! parallel to and opposing the first jaw member 25. Designatedat 36, 36 are respective screw members which extend horizontally throughrespective cylindrical bores formed in the opposite end portions of thesecond jaw member 34 and which are threadedly engaged with the first jawmember 25, the screw members 36, 36 extending parallel to the screwmember 29, as shown in Figure 2, but having headed portions 3'1, 3'!projecting from the side of the vise opposite the screw member 29. Therespective screw members 33, 36 are provided with the enlarged integralcollar portions 33, 38 which are received in annular recesses 39provided in the outer vertical faces of the second jaw member a retaining plate ii] being secured to the outer face of said second jawmember, and being formed with the open ended slots GI receiving theouter portions of the screw members 35 and cooperating with the enlargedcollar portions 33 to rotatably secure the screw members 36 to thesecond jaw member S t. Thus, rotation of the screw members 36 developshorizontal thrust which moves the second jaw member 33 towards or awayfrom the first jaw member 25, due to the threaded engagement of thescrew members 38 with the first jaw member 25, as above described.

The first jaw member 25 is formed with a vertical guideway substantiallyof rectangular cross sectional shape, as shown at 32. Said first jawmember 25 is formed with the opposing flange elements 53, d3 projectinginwardly towards each other at the respective opposite margins of thegroove i? and defining a vertical slot i therebetween. Secured to thefirst jaw member at the top and bottom ends of the groove G2 are therespective bearing plates and "is in which are journaled the respectivereduced end portions A! and iiof a vertical screw member "59 positionedin the vertical groove 32. Designated at 53 is a horizontal stud elementwhich is provided with a head portion 5i slidably fitting the spaceinwardly adjacent the flanges 33, t3 and the vertical groove 44, wherebythe stud member 59 is movable vertically. The head member 5! is formedwith internal threads which threadedly engage with the external threadson the screw member 49, whereby the rotation of the screw member 45moves the stud member 53 vertically.

The upper bearing element 4-? of the screw member 49 is formed with anon-circular recess which may be engaged by a suitable wrench 53 forrotating the screw member 49.

As shown in Figures 1 and 3, the inner opposing faces of the jaw members25 and 3:3 are generally trapezoidal in shape and are adapted to receivea gear blank 55 therebetween. The gear blank 55 is of course providedwith a circular central aperture which may be engaged on the stud member53, suitable filler sleeves 56 being provided on the stud member 53, asillustrated in Figure 5. It will be understood that the filler sleeves53 are employed where the central aperture of the gear blank is notequal in diameter to the diameter of the stud member 50, and since thecentral apertures of different gear blanks have diiierent diameters, asuitable number of filler sleeves 56 will ordinarily be r quired tosecurely mount the gear blank on the stud member 50.

The top surface 57 of the second jaw member 34 is formed with atransverse index line 58 which serves as a means for properlypositioning the gear blank for the cutting of the gear teeth thereon.

In using the device, the vise is mounted on the lathe bed in the mannerabove described, and as illustrated in Figure 1, the gear blank 55 beingreceived between the jaw members 25 and 34 and being engaged on the studmember 50, as illustrated in Figure 5. The gear blank is adjusted inheight to a position wherein the top portion thereof projects above thetop surfaces of the jaw members 25 and 34 by a distance somewhat greaterthan the depth of the teeth to be cut, and the jaws 25 and 34 areclamping locked together by tightening the screw members 36, 36. Thevise is of course positioned on the lathe bed in alignment with aselected series of gear tooth cutters I5, and before the beginning ofthe cut, the exposed portion of the pe riphery of the gear blank islocated immediately adjacent the rotary path of movement of the selectedcutters l5. To cut the groove between adjacent gear teeth, the screwmember 29 is ro tated, advancing the exposed peripheral portion of theblank past the cutters, the rotation of the screw member 29 causing thegear blank, held between the jaws 25 and 3 to be moved over the base I!to the right, as viewed in Figure 5, and past the cutters I5. After thegroove has been cut, the gear blank is retracted, the screw members 36,36 are loosened and the gear is rotated through the interval'between theindex marks 59 on the periphery of the gear blank, to bring the nextperipheral portion of the gear blank to be cut into alignment with theindex line 58 on the top surface 51 of jaw member 34. It will beunderstood that the initial cut is made by positioning one of the indexlines 59 on the gear blank periphery in registry with the index line 58.

After the gear blank has been rotated into position for the next cut,the jaw members 25 and 34 are tightened, by tightening the screw members36, whereupon the blank may be fed past the cutters I5 by means of thefeed screw 2:"! in the manner above described.

Suitable wrench members are provided, said members having non-circularrecesses adapted to interlock with the non-circular heads 3? on thescrew members 36, whereby said screw members may be readily loosened andtightened. The wrench members 60 may also be employed for loosening andtightening the headed screws 23 employed for clamping the vise to thelathe bed.

While a specific embodiment of an improved gear blank supporting visefor use on the bed of a lathe has been disclosed in the foregoingdescription, it will be understood that various modifications within thespirit of the invention may occur to those skilled in the art.Therefore, it is intended that no limitations be placed on the inventionexcept as defined by the scope of the appended claims.

What is claimed is:

l. A vise for supporting a gear blank on the bed of a lathe for cuttinggear teeth on the blank comprising an apertured base member, means forclainpingly securing said base member on the bed of a lathe, anupstanding element on said base member, a horizontal transverse screwthreaded. through said upstanding element. a first jaw member slidablymounted on said base member for transverse movement thereon, meansswivelly connecting the end of said screw to said first jaw member, asecond jaw member rotatably mounted on said base member, respectivehorizontal transverse additional screw members extending rotatablythrough the side marginal portions of said second jaw member andthreadedly engaging the first jaw member, means rotatably connectingsaid additional screw members to said second jaw member, a verticalscrew member journaled on said first jaw member and facing said secondjaw member, a horizontal stud element engageable through the centralaperture of a gear blank, and means on said stud element engaging thethreads of said vertical screw member for adjusting said stud elementvertically responsive to rotation of said vertical screw member.

2. A vise for supporting a gear blank on the bed of a lathe for cuttinggear teeth on the blank comprising an apertured base member, means forclampingly securing said base member on the bed of a lathe, anupstanding element on said base member, a horizontal transverse screwthreaded through said upstanding element, a first jaw member slidablymounted on said base member for transverse movement thereon, meansswivelly connecting the end of said screw to said first jaw member, asecond jaw member slidably mounted on said base member, respectivehorizontal transverse additional screw members extending rotatablythrough the side marginal portions of said second jaw member andthreadedly engaging the first jaw member, means rotatably connectingsaid additional screw members to said second jaw member, the edge ofsaid first jaw member adjacent the second jaw member being formed with avertical groove, a vertical screw member journaled on said first jawmember and being disposed in said groove, a horizontal stud elementengageable through the central aperture of a gear blank, and a headmember on said stud element slidably disposed in said groove and havinginternal threads engaging the threads of said vertical screw member foradjusting said stud element vertically responsive to rotation of saidvertical screw member.

3. A vise for supporting a gear blank on the bed of a lathe for cuttinggear teeth on the blank comprising an apertured base member, means forclampingly securing said base member on the bed of a lathe, anupstanding element on said base member, a horizontal transverse screwthreaded through said upstanding element, a first jaw member slidablymounted on said base member for transverse movement thereon, meansswivelly connecting the end of said screw to said first jaw member, asecond jaw member slidably mounted on said base member, respectivehorizontal transverse additional screw members extending rotatablythrough the side marginal portions of said second jaw member andthreadedly engaging the first jaw member, means rotatably connectingsaid additional screw members to said second jaw member, the edge ofsaid first jaw member adjacent the second jaw member being formed with avertical groove, respective bearing plates secured to said first jawmember over the top ends and the bottom ends of said groove, a verticalscrew member journaled at its respective ends in said bearing plates andbeing disposed in said groove, a horizontal stud element engageablethrough the central aperture of a gear blank, and a head member on saidstud element slidably disposed in said groove and having internalthreads engaging the threads of said vertical screw member for adjustingsaid stud element vertically responsive to rotation of said verticalscrew member.

No references cited.

